Influence of TiO2/Sb2O3 ratio on ZnO varistor ceramics

被引:47
作者
Zhang, CC [1 ]
Hu, YX [1 ]
Lu, WZ [1 ]
Cao, MH [1 ]
Zhou, DX [1 ]
机构
[1] Huazhong Univ Sci & Technol, Dept Solid State Elect, Wuhan 430074, Peoples R China
关键词
ceramics; degradation; grain-boundary; varistors; ZnO;
D O I
10.1016/S0955-2219(01)00232-1
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The influence of TiO2/Sb2O3 (Ti/Sb) ratio on the microstructure development and electrical properties of varistor ceramics in ZnO-(Bi2O3-TiO2-Sb2O3)-CoO-MnO2 system was investigated. Characterization of varistors was performed by XRD, SEM, d.c. degradation behavior, and electrical measurements. It is found that the Ti/Sb ratio greatly influences the microstructure and electrical properties of the ZnO varistor. The specimen with Ti/Sb ratio of 5 has the lowest breakdown field (20V/mm) and improved d.c. degradation behavior. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:61 / 65
页数:5
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